Crystal structure of 3,5-di­methyl­pyridine N-oxide dihydrate

In the title compound, also known as 3,5-lutidine N-oxide dihydrate, C(7)H(9)NO·2H(2)O, the N—O bond is weakened due to the involvement of the O atom as an acceptor of hydrogen bonds from the two water mol­ecules of crystallization present in the asymmetric unit. Fused R (3) (5)(10) ring motifs based on O—H⋯O hydrogen bonds form chains in the [010] direction, which are further connected by weak C—H⋯O inter­molecular contacts. As a result, the lutidine mol­ecules are stacked in an efficient manner, with π–π contacts characterized by a short separation of 3.569 (1) Å between the benzene rings.